We have already seen, if it was airborn there would already be thousands of cases here and millions world wide.
What is so hard to get about the way ebola is transmitted?
Not so hard at all. The "fear" is that ejections from an infected party can be transferred via HVAC systems, and air circulation systems, etc.
The virus is known to survive longer (open air type environment) than 1st thought, thus the "airborne fear".